Pre-slit PTFE/Silicone Septa
Description
Chromatography septas can be pre-slit. A pre-slit septum is an ideal choice in applications requiring 20% or more of the sample injection each time from the vial so that suction is avoided. The slit allows ambient gas to equalize the gas in the vial so that a vacuum is not created in the vial from the tight seal around the needle. If coring or clogging from a narrow needle or needle deflection from highly durable septa material is a concern, then choosing a pre-slit septum is a better choice. A PTFE/Silicone with a slitted septum allows for easier needle penetration as well as to release the vacuum that forms when a large volume of sample is withdrawn from a vial. This septum provides chromatographic characteristics similar to that of a septum without a slit except that the ability to withstand exposure to aggressive solvents is slightly lessened. Pre-slit septa are highly recommended for improving injection to injection reproducibility with autosamplers withdrawing greater than 50µL of sample from a 2mL vial, due to possible cavitation (vacuum).
Speta Details
Pre-slit PTFE / Silicone Septum
In order to pierce easily
Diameter: 8mm to 22mm
Thickness: 1mm, 1.5mm, 3mm
Septa Material: PTFE / Silicone
Septa Feature: Pre-slit I or X
Packing: 100pcs/pack, Inner PE bag; Standard Carton
Ajiren Pre-slit Speta
Aijiren offers two types of pre-seam septa, single slit and cross slit. Such slits can guide the injection needle to accurately pierce the septa into the chromatography vial without automatically breaking the fine injection liquid or the pad falling off into the chromatography bottle and contaminating the sample.
If you want to acquire extensive knowledge about PTFE/Silicone septa, you could consulting this article:Premium PTFE and Silicone Septa: Reliable Sealing Solutions